Fresh from signing a £1m deal with Gollancz, the science fiction author Alastair Reynolds has penned a story for the Guardian which follows a new recruit sent out to battle in an interstellar war.

Nineteen years after his first short story appeared, and nine years after the first of his eight novels was published, Scales is Reynolds' first foray into militaristic SF. In it, he explores the transformations war imposes on soldiers as his hero Nico's mission evolves into something stranger than he could have possibly imagined.

Reynolds is best-known for his mastery of space opera – the SF sub-genre in which the stakes are high and the aliens deadly – but, after 16 years working for the European Space Agency, he brings a scientist's rigour to the genre's high drama.